878ddf1f |
1 | //++\r |
2 | // Copyright (c) 2006, Intel Corporation \r |
3 | // All rights reserved. This program and the accompanying materials \r |
4 | // are licensed and made available under the terms and conditions of the BSD License \r |
5 | // which accompanies this distribution. The full text of the license may be found at \r |
6 | // http://opensource.org/licenses/bsd-license.php \r |
7 | // \r |
8 | // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
9 | // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
10 | // \r |
11 | // Module Name:\r |
12 | //\r |
13 | // IpfCpuCache.s\r |
14 | //\r |
15 | // Abstract:\r |
16 | //\r |
17 | // Contains Misc assembly procedures to support IPF CPU AP.\r |
18 | //\r |
19 | // Revision History:\r |
20 | //\r |
21 | //--\r |
22 | \r |
23 | .file "IpfCpuCache.s"\r |
24 | \r |
25 | #include "IpfMacro.i"\r |
26 | #include "IpfDefines.h"\r |
27 | \r |
28 | //-----------------------------------------------------------------------------\r |
29 | //++\r |
30 | // Flush Cache\r |
31 | //\r |
32 | // Arguments : \r |
33 | \r |
34 | // Input = in0 = Starting Address to Flush.\r |
35 | // Input = in1 = Length in bytes.\r |
36 | // Input = b0 = return branch register.\r |
37 | // On Entry :\r |
38 | //\r |
39 | // Return Value: \r |
40 | //\r |
41 | // VOID\r |
42 | // SalFlushCache (\r |
43 | // IN UINT64 BaseToFlush,\r |
44 | // IN UINT64 LengthToFlush\r |
45 | // );\r |
46 | //\r |
47 | //--\r |
48 | //---------------------------------------------------------------------------\r |
49 | PROCEDURE_ENTRY (SalFlushCache)\r |
50 | \r |
51 | NESTED_SETUP (5,8,0,0)\r |
52 | \r |
53 | mov loc2 = ar.lc\r |
54 | \r |
55 | mov loc3 = in0 // Start address.\r |
56 | mov loc4 = in1;; // Length in bytes.\r |
57 | \r |
58 | cmp.eq p6,p7 = loc4, r0;; // If Length is zero then don't flush any cache\r |
59 | (p6) br.spnt.many DoneFlushingC;; \r |
60 | \r |
61 | add loc4 = loc4,loc3 \r |
62 | mov loc5 = 1;;\r |
63 | sub loc4 = loc4, loc5 ;; // the End address to flush\r |
64 | \r |
65 | dep loc3 = r0,loc3,0,5 \r |
66 | dep loc4 = r0,loc4,0,5;; \r |
67 | shr loc3 = loc3,5 \r |
68 | shr loc4 = loc4,5;; // 32 byte cache line\r |
69 | \r |
70 | sub loc4 = loc4,loc3;; // total flush count, It should be add 1 but \r |
71 | // the br.cloop will first execute one time \r |
72 | mov loc3 = in0 \r |
73 | mov loc5 = 32 \r |
74 | mov ar.lc = loc4;;\r |
75 | \r |
76 | StillFlushingC:\r |
77 | fc loc3;; \r |
78 | sync.i;;\r |
79 | srlz.i;;\r |
80 | add loc3 = loc5,loc3;;\r |
81 | br.cloop.sptk.few StillFlushingC;;\r |
82 | \r |
83 | DoneFlushingC: \r |
84 | mov ar.lc = loc2 \r |
85 | NESTED_RETURN\r |
86 | \r |
87 | PROCEDURE_EXIT (SalFlushCache)\r |
88 | \r |